Provell;Nsc16650;Protoveratrines;Protoveratrines A and b;Protoveratrine A, mixt. with protoveratrine b;Cevane-3,4,6,7,14,15,16,20-octol, 4,9-epoxy-, 6,7-diacetate 3-(2,3-dihydroxy-2-methylbutanoate) 15-(2-methylbutanoate), [3.beta.(2R,3R),4.alpha.,6.alpha.,7.alpha.,15.alpha.(R),16.beta.]-, mixt. with[3.beta.(S),4.alpha.,6.alpha.,7.alpha.,15.alpha.(R),16.beta.]-4,9-epoxycevane-3,4,6,7,14,15,16,20-octol 6,7-diacetate 3-(2-hydroxy-2-methylbutanoate) 15-(2-methylbutanoate)
